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Benatto VG, de Jesus JPA, de Castro AA, Assis LC, Ramalho TC, La Porta FA. Prospects of ZnS and ZnO as smart semiconductor materials in light-activated antimicrobial coatings for mitigation of severe acute respiratory syndrome coronavirus-2 infection. MATERIALS TODAY. COMMUNICATIONS 2023; 34:105192. [PMID: 36570033 PMCID: PMC9758762 DOI: 10.1016/j.mtcomm.2022.105192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 11/26/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
We carried out theoretical and experimental analyses of ZnO and ZnS nanoparticles as smart semiconductor materials in light-activated antimicrobial coating for application in masks. We used low-cost hydrothermally processable precursors to direct the growth of the coatings on cotton fabric. Both ZnO and ZnS coatings had high reactivities as disinfection agents in photocatalysis reactions for the degradation of a methylene blue dye solution. Also, these coatings showed excellent UV protection properties. For understanding at the molecular level, the broad-spectrum biological activities of the ZnO and ZnS coatings against Fusarium Oxysporum fungi, Escherichia coli bacteria, and severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus and their variants, were investigated computationally. Hexagonal Zn6O6 and Zn6S6 clusters were used as models for the simulations through excited- and ground-state calculations. The theoretical findings show that changes in the local chemical environment in these excited systems have a profound impact on their physical and chemical properties and thus, can provide a better understanding to engineer new functional materials in light-activated antimicrobial coatings for the mitigation of SARS-CoV-2 infection.
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Affiliation(s)
- V G Benatto
- Laboratory of Nanotechnology and Computational Chemistry, Federal University of Technology - Paraná, Londrina 86036-370, Brazil
| | - J P A de Jesus
- Laboratory of Nanotechnology and Computational Chemistry, Federal University of Technology - Paraná, Londrina 86036-370, Brazil
| | - A A de Castro
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil
| | - L C Assis
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil
| | - T C Ramalho
- Department of Chemistry, Federal University of Lavras, Lavras 37200-000, Brazil
| | - F A La Porta
- Laboratory of Nanotechnology and Computational Chemistry, Federal University of Technology - Paraná, Londrina 86036-370, Brazil
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2
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Yi M, Lou J, Zhu W, Li D, Yu P, Lu H. Mechanism of β-blocker biodegradation by wastewater microorganisms. JOURNAL OF HAZARDOUS MATERIALS 2023; 444:130338. [PMID: 36417780 DOI: 10.1016/j.jhazmat.2022.130338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 10/22/2022] [Accepted: 11/04/2022] [Indexed: 06/16/2023]
Abstract
The recalcitrant β-blockers have been widely detected in aquatic environments up to several hundred μg/L, which are major contributors to β1 antagonistic activities in wastewater. Their biodegradation mechanisms remain obscure, hindering the development of efficient removal techniques. This study constructed the biodegradation pathways for three typical β-blockers, namely atenolol, metoprolol, and propranolol, assessed the toxicity of their major biotransformation products, and identified the key enzyme catalyzing the O-dealkylation reaction leading to pollutant mineralization. Atenolol and metoprolol degradation was more efficient than that of propranolol by activated sludge, producing metoprolol acid (MTPA) as a major intermediate. Hydrogenophaga sp. YM1 isolated from activated sludge possess the α-ketoglutarate dependent dioxygenase (TfdA) responsible for O-dealkylation of MTPA and propranolol, producing 4-hydroxyphenylacetic acid (4-HPA) that can be further degraded and ultimately enters the TCA cycle. The role of TfdA was verified by proteomics, enzyme stimulation/inhibition tests, and gene knockout experiments. Molecular docking suggests its different interactions with MTPA and propranolol. Acetate facilitated the degradation of β-blockers efficiently. The results may shed light on enhanced biological removals of broader β-blockers and their transformation products in the environment.
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Affiliation(s)
- Ming Yi
- Institute of Plant Protection and Microbiology, Zhejiang Academy of Agriculture Science, Hangzhou, Zhejiang, China
| | - Jinxiu Lou
- College of Environment, Zhejiang University of Technology, Hangzhou 310014, China
| | - Wanlu Zhu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Dan Li
- Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science and Engineering, Fudan University, Shanghai 200438, China
| | - Pingfeng Yu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China
| | - Huijie Lu
- Key Laboratory of Environment Remediation and Ecological Health, Ministry of Education, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310058, China; Academy of Ecological Civilization, Zhejiang University, Hangzhou 310058, China.
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3
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de Castro AA, Franco JH, de Andrade AR, Ramalho TC. Rationalizing the activity of a hybrid biocatalyst for ethanol oxidation. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133682] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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4
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Li L, Gao S, Yang L, Liu YL, Li P, Ye F, Fu Y. Cobalt (II) complex as a fluorescent sensing platform for the selective and sensitive detection of triketone HPPD inhibitors. JOURNAL OF HAZARDOUS MATERIALS 2021; 404:124015. [PMID: 33039827 DOI: 10.1016/j.jhazmat.2020.124015] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 08/26/2020] [Accepted: 09/12/2020] [Indexed: 05/28/2023]
Abstract
4-Hydroxyphenylpyruvatedioxygenase (HPPD) is a Fe(II)/Co(II)-dependent enzyme which has become one of the most effective herbicide targets. HPPD inhibitors have been developed as efficient herbicides for resistant weed control. Developing a method for efficient and rapid HPPD inhibitors detection is still challenging. N-n-butyl-4-methylhydrazinecarbothioamide-1,8-naphthalimide (NMN) was synthesized and used to detect Co2+ efficiently with the limit of detection (LOD) of 7.82 nM with a turn-on fluorescence. Herein a novel fluorescent complex, NMN‒Co2+ was employed to determine HPPD inhibitors which performed a turn-off effect in the sensing process based on the competitive coordination between the probe and HPPD with Co2+. The LODs for three commercial triketone HPPD inhibitors (mesotrione, tembotrione and NTBC) were 6.60 nM, 7.37 nM and 10.22 nM with good sensitivity and selectivity. Furthermore, the present probe has potentials to quantitatively detect mesotrione and tembotrione in real samples.
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Affiliation(s)
- Lu Li
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Shuang Gao
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Liu Yang
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Yu-Long Liu
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Ping Li
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China
| | - Fei Ye
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
| | - Ying Fu
- Department of Applied Chemistry, College of Arts and Sciences, Northeast Agricultural University, Harbin, 150030, People's Republic of China.
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5
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Cathepsin K inhibitors based on 2-amino-1,3,4-oxadiazole derivatives. Bioorg Chem 2021; 109:104662. [PMID: 33626452 DOI: 10.1016/j.bioorg.2021.104662] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2020] [Revised: 01/06/2021] [Accepted: 01/12/2021] [Indexed: 11/22/2022]
Abstract
Two new series of hitherto unknown dipeptides, containing an electrophilic nitrile or a non-electrophilic 2-amino-1,3,4-oxadiazole moiety were synthesized and evaluated in vitro as Cathepsin K (Cat K) inhibitors. From 14 compounds obtained, the oxadiazole derivatives 10a, 10b, 10e, and 10g acted as enzymatic competitive inhibitors with Ki values between 2.13 and 7.33 µM. Molecular docking calculations were carried out and demonstrated that all inhibitors performed hydrogen bonds with residues from the enzyme active site, such as Asn18. The best inhibitors (10a, 10b, 10g) could also perform these bonds with Cys25, and 10a showed the most stabilizing interaction energy (-134.36 kcal mol-1) with the active cavity. For the first time, derivatives based in 2-amino-1,3,4-oxadiazole scaffolds were evaluated, and the results suggested that this core displays a remarkable potential as a building block for Cat K inhibitors.
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6
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Bretz RR, de Castro AA, Lara Ferreira IF, Ramalho TC, Silva MC. Experimental and theoretical affinity and catalysis studies between halogenated phenols and peroxidases: Understanding the bioremediation potential. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 202:110895. [PMID: 32615496 DOI: 10.1016/j.ecoenv.2020.110895] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 06/08/2020] [Accepted: 06/12/2020] [Indexed: 06/11/2023]
Abstract
Halogenated phenols, such as 2,4-dichlorophenol (2,4-DCP) and 4-bromophenol (4-BP) are pollutants generated by a various industrial sectors like chemical, dye, paper bleaching, pharmaceuticals or in an agriculture as pesticides. The use of Horseradish peroxidase (HRP) in the halogenated phenols treatment has already been mentioned, but it is not well understood how the different phenolic substrates can bind in the peroxidase active site nor how these specific interactions can influence in the bioremediation potential. In this work, different removal efficiencies were obtained for phenolic compounds investigated using HRP as catalyst (93.87 and 59.19% to 4BP and 2,4 DCP, respectively). Thus, to rationalize this result based on the interactions of phenols with active center of HRP, we combine computational and experimental methodologies. The theoretical approaches utilized include density functional theory (DFT) calculations, docking simulation and quantum mechanics/molecular mechanics (QM/MM) technique. Michaelis Menten constant (Km) obtained through experimental methodologies were 2.3 and 0.95 mM to 2,4-DCP and 4-BP, respectively, while the specificity constant (Kcat/Km) found was 1.44 mM-1 s-1 and 0.62 mM-1 s-1 for 4-BP and 2,4-DCP, respectively. The experimental parameters appointed to the highest affinity of HRP to 4-BP. According to the molecular docking calculations, both ligands have shown stabilizing intermolecular interaction energies within the HRP active site, however, the 4-BP showed more stabilizing interaction energy (-53.00 kcal mol-1) than 2,4-dichlorophenol (-49.23 kcal mol-1). Besides that, oxidative mechanism of 4-BP and 2,4-DCP was investigated by the hybrid QM/MM approach. This study showed that the lowest activation energy values for transition states investigated were obtained for 4-BP. Therefore, by theoretical approach, the compound 4-BP showed the more stabilizing interaction and activation energy values related to the interaction within the enzyme and the oxidative reaction mechanism, respectively, which corroborates with experimental parameters obtained. The combination between experimental and theoretical approaches was essential to understand how the degradation potential of the HRP enzyme depends on the interactions between substrate and the active center cavity of the enzyme.
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Affiliation(s)
- Raphael Resende Bretz
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil
| | | | - Igor F Lara Ferreira
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil
| | - Teodorico C Ramalho
- Department of Chemistry, Federal University of Lavras, Lavras, Brazil; Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove, Czech Republic
| | - Maria Cristina Silva
- Department of Natural Sciences (DCNAT), Federal University of São João del-Rei, São João del Rei, Brazil.
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7
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Understanding the Interaction Modes and Reactivity of Trimedoxime toward MmAChE Inhibited by Nerve Agents: Theoretical and Experimental Aspects. Int J Mol Sci 2020; 21:ijms21186510. [PMID: 32899591 PMCID: PMC7554915 DOI: 10.3390/ijms21186510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 08/31/2020] [Accepted: 09/02/2020] [Indexed: 11/17/2022] Open
Abstract
Organophosphorus (OP) compounds are used as both chemical weapons and pesticides. However, these agents are very dangerous and toxic to humans, animals, and the environment. Thus, investigations with reactivators have been deeply developed in order to design new antidotes with better efficiency, as well as a greater spectrum of action in the acetylcholinesterase (AChE) reactivation process. With that in mind, in this work, we investigated the behavior of trimedoxime toward the Mus musculus acetylcholinesterase (MmAChE) inhibited by a range of nerve agents, such as chemical weapons. From experimental assays, reactivation percentages were obtained for the reactivation of different AChE–OP complexes. On the other hand, theoretical calculations were performed to assess the differences in interaction modes and the reactivity of trimedoxime within the AChE active site. Comparing theoretical and experimental data, it is possible to notice that the oxime, in most cases, showed better reactivation percentages at higher concentrations, with the best result for the reactivation of the AChE–VX adduct. From this work, it was revealed that the mechanistic process contributes most to the oxime efficiency than the interaction in the site. In this way, this study is important to better understand the reactivation process through trimedoxime, contributing to the proposal of novel antidotes.
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8
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Fu Y, Liu YX, Yi KH, Li MQ, Li JZ, Ye F. Quantitative Structure Activity Relationship Studies and Molecular Dynamics Simulations of 2-(Aryloxyacetyl)cyclohexane-1,3-Diones Derivatives as 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors. Front Chem 2019; 7:556. [PMID: 31482084 PMCID: PMC6710436 DOI: 10.3389/fchem.2019.00556] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Accepted: 07/22/2019] [Indexed: 11/17/2022] Open
Abstract
4-Hydroxyphenylpyruvate dioxygenase (HPPD) is a significant enzyme in the biosynthesis of plastoquinone and tocopherol. Moreover, it is also a potential target to develop new herbicide. The technology of computer-aided drug design (CADD) is a useful tool in the efficient discovery of new HPPD inhibitors. Forty-three compounds with known activities were used to generate comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA) models based on common framework and molecular docking. The structural contribution to the activity was determined, which provided further information for the design of novel inhibitors. Molecular docking was used to explain the changes in activity caused by the binding mode between ligand and protein. The molecular dynamics (MD) results indicated that the electrostatic energy was the major driving force for ligand–protein interaction and the Phe403 made the greatest contribution to the binding. The present work has provided useful information for the rational design of novel HPPD inhibitors with improved activity.
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Affiliation(s)
- Ying Fu
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Yong-Xuan Liu
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Ke-Han Yi
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Ming-Qiang Li
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Jia-Zhong Li
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Fei Ye
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
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9
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Galdino ACM, Viganor L, de Castro AA, da Cunha EFF, Mello TP, Mattos LM, Pereira MD, Hunt MC, O'Shaughnessy M, Howe O, Devereux M, McCann M, Ramalho TC, Branquinha MH, Santos ALS. Disarming Pseudomonas aeruginosa Virulence by the Inhibitory Action of 1,10-Phenanthroline-5,6-Dione-Based Compounds: Elastase B (LasB) as a Chemotherapeutic Target. Front Microbiol 2019; 10:1701. [PMID: 31428062 PMCID: PMC6688126 DOI: 10.3389/fmicb.2019.01701] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 07/10/2019] [Indexed: 11/13/2022] Open
Abstract
Elastase B (lasB) is a multifunctional metalloenzyme secreted by the gram-negative pathogen Pseudomonas aeruginosa, and this enzyme orchestrates several physiopathological events during bacteria-host interplays. LasB is considered to be a potential target for the development of an innovative chemotherapeutic approach, especially against multidrug-resistant strains. Recently, our group showed that 1,10-phenanthroline-5,6-dione (phendione), [Ag(phendione)2]ClO4 (Ag-phendione) and [Cu(phendione)3](ClO4)2.4H2O (Cu-phendione) had anti-P. aeruginosa action against both planktonic- and biofilm-growing cells. In the present work, we have evaluated the effects of these compounds on the (i) interaction with the lasB active site using in silico approaches, (ii) lasB proteolytic activity by using a specific fluorogenic peptide substrate, (iii) lasB gene expression by real time-polymerase chain reaction, (iv) lasB protein secretion by immunoblotting, (v) ability to block the damages induced by lasB on a monolayer of lung epithelial cells, and (vi) survivability of Galleria mellonella larvae after being challenged with purified lasB and lasB-rich bacterial secretions. Molecular docking analyses revealed that phendione and its Ag+ and Cu2+ complexes were able to interact with the amino acids forming the active site of lasB, particularly Cu-phendione which exhibited the most favorable interaction energy parameters. Additionally, the test compounds were effective inhibitors of lasB activity, blocking the in vitro cleavage of the peptide substrate, aminobenzyl-Ala-Gly-Leu-Ala-p-nitrobenzylamide, with Cu-phendione having the best inhibitory action (K i = 90 nM). Treating living bacteria with a sub-inhibitory concentration (½ × MIC value) of the test compounds caused a significant reduction in the expression of the lasB gene as well as its mature protein production/secretion. Further, Ag-phendione and Cu-phendione offered protective action for lung epithelial cells, reducing the A549 monolayer damage by approximately 32 and 42%, respectively. Interestingly, Cu-phendione mitigated the toxic effect of both purified lasB molecules and lasB-containing bacterial secretions in the in vivo model, increasing the survival time of G. mellonella larvae. Collectively, these data reinforce the concept of lasB being a veritable therapeutic target and phendione-based compounds (mainly Cu-phendione) being prospective anti-virulence drugs against P. aeruginosa.
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Affiliation(s)
- Anna Clara M Galdino
- Department of General Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Postgraduate Program in Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Lívia Viganor
- Department of General Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | | | | | - Thaís P Mello
- Department of General Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Larissa M Mattos
- Postgraduate Program in Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marcos D Pereira
- Postgraduate Program in Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mary C Hunt
- The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | - Megan O'Shaughnessy
- The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | - Orla Howe
- The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | - Michael Devereux
- The Centre for Biomimetic and Therapeutic Research, Focas Research Institute, Technological University Dublin, Dublin, Ireland
| | - Malachy McCann
- Department of Chemistry, Maynooth University, Maynooth, Ireland
| | | | - Marta H Branquinha
- Department of General Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - André L S Santos
- Department of General Microbiology, Institute of Microbiology Paulo de Góes, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.,Postgraduate Program in Biochemistry, Institute of Chemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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10
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Franco JH, da Silva BF, Dias EFG, de Castro AA, Ramalho TC, Zanoni MVB. Influence of auxochrome group in disperse dyes bearing azo groups as chromophore center in the biotransformation and molecular docking prediction by reductase enzyme: Implications and assessment for environmental toxicity of xenobiotics. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2018; 160:114-126. [PMID: 29793200 DOI: 10.1016/j.ecoenv.2018.04.066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Revised: 04/25/2018] [Accepted: 04/27/2018] [Indexed: 06/08/2023]
Abstract
Synthetic azo dyes have increasingly become a matter of great concern as a result of the genotoxic and mutagenic potential of the products derived from azo dye biotransformation. This work evaluates the manner in which reducing enzymes produced by Escherichia coli (E. coli) act on three disperse dyes bearing azo groups, namely Disperse Red 73 (DR 73), Disperse Red 78 (DR 78), and Disperse Red 167 (DR 167). UV-Vis spectrophotometry, high-performance liquid chromatography with diode array detector (HPLC-DAD), and liquid chromatography mass spectrometry (LC-MS/MS) were applied towards the identification of the main products. Seven days of incubation of the azo dyes with the tested enzymes yielded a completely bleached solution. 3-4-Aminophenyl-ethyl-amino-propanitrile was detected following the biotransformation of both DR 73 and DR 78. 4-Nitroaniline and 2-chloro-4-nitroaniline were detected upon the biotransformation of DR 73 and DR 78, respectively. The main products derived from the biotransformation of DR 167 were dimethyl 3,3'-3-acetamido-4-aminophenyl-azanedyl-dipropanoate and 2-chloro-4-nitroaniline. The results imply that DR 73 lost the CN- substituent during the biotransformation. Furthermore, theoretical calculations were also carried out aiming at evaluating the interaction and reactivity of these compounds with DNA. Taken together, the results indicate that DR 73, DR 78, and DR 167 pose health risks and serious threats to both human beings and the environment at large as their biotransformation produces harmful compounds such as amines, which have been widely condemned by the International Agency for Research on Cancer.
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Affiliation(s)
- Jefferson Honorio Franco
- Institute of Chemistry, State University "Julio de Mesquita Filho"- UNESP, Araraquara, São Paulo, Brazil
| | - Bianca F da Silva
- Institute of Chemistry, State University "Julio de Mesquita Filho"- UNESP, Araraquara, São Paulo, Brazil
| | | | - Alexandre A de Castro
- Department of Chemistry, Federal University of Lavras - UFLA, Lavras, Minas Gerais, Brazil
| | - Teodorico C Ramalho
- Department of Chemistry, Federal University of Lavras - UFLA, Lavras, Minas Gerais, Brazil
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11
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Soares FV, de Castro AA, Pereira AF, Leal DHS, Mancini DT, Krejcar O, Ramalho TC, da Cunha EFF, Kuca K. Theoretical Studies Applied to the Evaluation of the DFPase Bioremediation Potential against Chemical Warfare Agents Intoxication. Int J Mol Sci 2018; 19:E1257. [PMID: 29690585 PMCID: PMC5979579 DOI: 10.3390/ijms19041257] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 04/16/2018] [Accepted: 04/19/2018] [Indexed: 11/30/2022] Open
Abstract
Organophosphorus compounds (OP) are part of a group of compounds that may be hazardous to health. They are called neurotoxic agents because of their action on the nervous system, inhibiting the acetylcholinesterase (AChE) enzyme and resulting in a cholinergic crisis. Their high toxicity and rapid action lead to irreversible damage to the nervous system, drawing attention to developing new treatment methods. The diisopropyl fluorophosphatase (DFPase) enzyme has been considered as a potent biocatalyst for the hydrolysis of toxic OP and has potential for bioremediation of this kind of intoxication. In order to investigate the degradation process of the nerve agents Tabun, Cyclosarin and Soman through the wild-type DFPase, and taking into account their stereochemistry, theoretical studies were carried out. The intermolecular interaction energy and other parameters obtained from the molecular docking calculations were used to construct a data matrix, which were posteriorly treated by statistical analyzes of chemometrics, using the PCA (Principal Components Analysis) multivariate analysis. The analyzed parameters seem to be quite important for the reaction mechanisms simulation (QM/MM). Our findings showed that the wild-type DFPase enzyme is stereoselective in hydrolysis, showing promising results for the catalytic degradation of the neurotoxic agents under study, with the degradation mechanism performed through two proposed pathways.
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Affiliation(s)
- Flávia V Soares
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
| | - Alexandre A de Castro
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
| | - Ander F Pereira
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
| | - Daniel H S Leal
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
- Department of Health Sciences, Federal University of Espírito Santo, 29932-540 São Mateus, ES, Brazil.
| | - Daiana T Mancini
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
| | - Ondrej Krejcar
- Center for Basic and Applied Research, Faculty of Informatics and Management, University Hradec Kralove, 50003 Hradec Kralove, Czech Republic.
| | - Teodorico C Ramalho
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
- Center for Basic and Applied Research, Faculty of Informatics and Management, University Hradec Kralove, 50003 Hradec Kralove, Czech Republic.
| | - Elaine F F da Cunha
- Laboratory of Molecular Modeling, Chemistry Department, Federal University of Lavras, 37200-000 Lavras, MG, Brazil.
| | - Kamil Kuca
- Center for Basic and Applied Research, Faculty of Informatics and Management, University Hradec Kralove, 50003 Hradec Kralove, Czech Republic.
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12
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Fu Y, Sun YN, Yi KH, Li MQ, Cao HF, Li JZ, Ye F. Combination of Virtual Screening Protocol by in Silico toward the Discovery of Novel 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors. Front Chem 2018; 6:14. [PMID: 29468151 PMCID: PMC5807903 DOI: 10.3389/fchem.2018.00014] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 01/18/2018] [Indexed: 11/13/2022] Open
Abstract
4-Hydroxyphenylpyruvate dioxygenase (EC 1.13.11.27, HPPD) is a potent new bleaching herbicide target. Therefore, in silico structure-based virtual screening was performed in order to speed up the identification of promising HPPD inhibitors. In this study, an integrated virtual screening protocol by combining 3D-pharmacophore model, molecular docking and molecular dynamics (MD) simulation was established to find novel HPPD inhibitors from four commercial databases. 3D-pharmacophore Hypo1 model was applied to efficiently narrow potential hits. The hit compounds were subsequently submitted to molecular docking studies, showing four compounds as potent inhibitor with the mechanism of the Fe(II) coordination and interaction with Phe360, Phe403, and Phe398. MD result demonstrated that nonpolar term of compound 3881 made great contributions to binding affinities. It showed an IC50 being 2.49 μM against AtHPPD in vitro. The results provided useful information for developing novel HPPD inhibitors, leading to further understanding of the interaction mechanism of HPPD inhibitors.
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Affiliation(s)
- Ying Fu
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Yi-Na Sun
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Ke-Han Yi
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Ming-Qiang Li
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Hai-Feng Cao
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
| | - Jia-Zhong Li
- School of Pharmacy, Lanzhou University, Lanzhou, China
| | - Fei Ye
- Department of Applied Chemistry, College of Science, Northeast Agricultural University, Harbin, China
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13
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Ndikuryayo F, Moosavi B, Yang WC, Yang GF. 4-Hydroxyphenylpyruvate Dioxygenase Inhibitors: From Chemical Biology to Agrochemicals. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:8523-8537. [PMID: 28903556 DOI: 10.1021/acs.jafc.7b03851] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
The development of new herbicides is receiving considerable attention to control weed biotypes resistant to current herbicides. Consequently, new enzymes are always desired as targets for herbicide discovery. 4-Hydroxyphenylpyruvate dioxygenase (HPPD, EC 1.13.11.27) is an enzyme engaged in photosynthetic activity and catalyzes the transformation of 4-hydroxyphenylpyruvic acid (HPPA) into homogentisic acid (HGA). HPPD inhibitors constitute a promising area of discovery and development of innovative herbicides with some advantages, including excellent crop selectivity, low application rates, and broad-spectrum weed control. HPPD inhibitors have been investigated for agrochemical interests, and some of them have already been commercialized as herbicides. In this review, we mainly focus on the chemical biology of HPPD, discovery of new potential inhibitors, and strategies for engineering transgenic crops resistant to current HPPD-inhibiting herbicides. The conclusion raises some relevant gaps for future research directions.
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Affiliation(s)
- Ferdinand Ndikuryayo
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Behrooz Moosavi
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Wen-Chao Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
| | - Guang-Fu Yang
- Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Central China Normal University , Wuhan 430079, P. R. China
- Collaborative Innovation Center of Chemical Science and Engineering , Tianjin 30071, P. R. China
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14
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de Castro AA, Assis LC, Silva DR, Corrêa S, Assis TM, Gajo GC, Soares FV, Ramalho TC. Computational enzymology for degradation of chemical warfare agents: promising technologies for remediation processes. AIMS Microbiol 2017; 3:108-135. [PMID: 31294152 PMCID: PMC6604975 DOI: 10.3934/microbiol.2017.1.108] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 02/14/2017] [Indexed: 11/18/2022] Open
Abstract
Chemical weapons are a major worldwide problem, since they are inexpensive, easy to produce on a large scale and difficult to detect and control. Among the chemical warfare agents, we can highlight the organophosphorus compounds (OP), which contain the phosphorus element and that have a large number of applications. They affect the central nervous system and can lead to death, so there are a lot of works in order to design new effective antidotes for the intoxication caused by them. The standard treatment includes the use of an anticholinergic combined to a central nervous system depressor and an oxime. Oximes are compounds that reactivate Acetylcholinesterase (AChE), a regulatory enzyme responsible for the transmission of nerve impulses, which is one of the molecular targets most vulnerable to neurotoxic agents. Increasingly, enzymatic treatment becomes a promising alternative; therefore, other enzymes have been studied for the OP degradation function, such as phosphotriesterase (PTE) from bacteria, human serum paraoxonase 1 (HssPON1) and diisopropyl fluorophosphatase (DFPase) that showed significant performances in OP detoxification. The understanding of mechanisms by which enzymes act is of extreme importance for the projection of antidotes for warfare agents, and computational chemistry comes to aid and reduce the time and costs of the process. Molecular Docking, Molecular Dynamics and QM/MM (quantum-mechanics/molecular-mechanics) are techniques used to investigate the molecular interactions between ligands and proteins.
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Affiliation(s)
| | - Letícia C. Assis
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Daniela R. Silva
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Silviana Corrêa
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Tamiris M. Assis
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Giovanna C. Gajo
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Flávia V. Soares
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
| | - Teodorico C. Ramalho
- Department of Chemistry, Federal University of Lavras, 37200-000, Lavras, Brazil
- Center for Basic and Applied Research, Faculty of Informatics and Management, University of Hradec Kralove, Rokitanskeho 62, 50003, Czech Republic
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15
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Dumas E, Giraudo M, Goujon E, Halma M, Knhili E, Stauffert M, Batisson I, Besse-Hoggan P, Bohatier J, Bouchard P, Celle-Jeanton H, Costa Gomes M, Delbac F, Forano C, Goupil P, Guix N, Husson P, Ledoigt G, Mallet C, Mousty C, Prévot V, Richard C, Sarraute S. Fate and ecotoxicological impact of new generation herbicides from the triketone family: An overview to assess the environmental risks. JOURNAL OF HAZARDOUS MATERIALS 2017; 325:136-156. [PMID: 27930998 DOI: 10.1016/j.jhazmat.2016.11.059] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 10/21/2016] [Accepted: 11/19/2016] [Indexed: 06/06/2023]
Abstract
Triketones, derived chemically from a natural phytotoxin (leptospermone), are a good example of allelochemicals as lead molecules for the development of new herbicides. Targeting a new and key enzyme involved in carotenoid biosynthesis, these latest-generation herbicides (sulcotrione, mesotrione and tembotrione) were designed to be eco-friendly and commercialized fifteen-twenty years ago. The mechanisms controlling their fate in different ecological niches as well as their toxicity and impact on different organisms or ecosystems are still under investigation. This review combines an overview of the results published in the literature on β-triketones and more specifically, on the commercially-available herbicides and includes new results obtained in our interdisciplinary study aiming to understand all the processes involved (i) in their transfer from the soil to the connected aquatic compartments, (ii) in their transformation by photochemical and biological mechanisms but also to evaluate (iii) the impacts of the parent molecules and their transformation products on various target and non-target organisms (aquatic microorganisms, plants, soil microbial communities). Analysis of all the data on the fate and impact of these molecules, used pure, as formulation or in cocktails, give an overall guide for the assessment of their environmental risks.
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Affiliation(s)
- E Dumas
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - M Giraudo
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - E Goujon
- Clermont Université, Université Blaise Pascal, Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier, 63000 Clermont-Ferrand, France; INRA, UMR PIAF 547, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - M Halma
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - E Knhili
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - M Stauffert
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France; Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - I Batisson
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - P Besse-Hoggan
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France.
| | - J Bohatier
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - P Bouchard
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - H Celle-Jeanton
- Clermont Université, Université Blaise Pascal, Laboratoire Magmas et Volcans, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6524, LMV, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - M Costa Gomes
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - F Delbac
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - C Forano
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - P Goupil
- Clermont Université, Université Blaise Pascal, Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier, 63000 Clermont-Ferrand, France; INRA, UMR PIAF 547, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - N Guix
- INRA, UMR 1095 Génétique, Diversité et Ecophysiologie des Céréales, 5 chemin de Beaulieu, 63039 Clermont-Ferrand, France; VetAgro Sup, 89 avenue de l'Europe, BP 35, 63370 Lempdes, France; UMR Génétique Diversité et Ecophysiologie des Céréales, INRA-UBP, UMR 1095, 63000 Clermont-Ferrand, France
| | - P Husson
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - G Ledoigt
- Clermont Université, Université Blaise Pascal, Physique et Physiologie Intégratives de l'Arbre Fruitier et Forestier, 63000 Clermont-Ferrand, France; INRA, UMR PIAF 547, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - C Mallet
- Clermont Université, Université Blaise Pascal-Université d'Auvergne, Laboratoire Microorganismes: Génome et Environnement, BP 10448, 63000 Clermont Ferrand, France; CNRS, UMR 6023, LMGE, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - C Mousty
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - V Prévot
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - C Richard
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
| | - S Sarraute
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, BP 10448, 63000 Clermont-Ferrand, France; CNRS, UMR 6296, ICCF, TSA 60026, CS 60026, 63178 Aubière Cedex, France
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Santucci A, Bernardini G, Braconi D, Petricci E, Manetti F. 4-Hydroxyphenylpyruvate Dioxygenase and Its Inhibition in Plants and Animals: Small Molecules as Herbicides and Agents for the Treatment of Human Inherited Diseases. J Med Chem 2017; 60:4101-4125. [PMID: 28128559 DOI: 10.1021/acs.jmedchem.6b01395] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
This review mainly focuses on the physiological function of 4-hydroxyphenylpyruvate dioxygenase (HPPD), as well as on the development and application of HPPD inhibitors of several structural classes. Among them, one illustrative example is represented by compounds belonging to the class of triketone compounds. They were discovered by serendipitous observations on weed growth and were developed as bleaching herbicides. Informed reasoning on nitisinone (NTBC, 14), a triketone that failed to reach the final steps of the herbicidal design and development process, allowed it to become a curative agent for type I tyrosinemia (T1T) and to enter clinical trials for alkaptonuria. These results boosted the research of new compounds able to interfere with HPPD activity to be used for the treatment of the tyrosine metabolism-related diseases.
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Affiliation(s)
- Annalisa Santucci
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena , via A. Moro 2, I-53100 Siena, Italy
| | - Giulia Bernardini
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena , via A. Moro 2, I-53100 Siena, Italy
| | - Daniela Braconi
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena , via A. Moro 2, I-53100 Siena, Italy
| | - Elena Petricci
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena , via A. Moro 2, I-53100 Siena, Italy
| | - Fabrizio Manetti
- Dipartimento di Biotecnologie, Chimica e Farmacia, Università degli Studi di Siena , via A. Moro 2, I-53100 Siena, Italy
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A. de Castro A, C. Assis L, R. Silva D, Corrêa S, M. Assis T, C. Gajo G, V. Soares F, C. Ramalho T. Computational enzymology for degradation of chemical warfare agents: promising technologies for remediation processes. AIMS Microbiol 2017. [DOI: 10.3934/microbiol.2017.2.108] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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18
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da Rocha EP, Rodrigues HA, da Cunha EF, Ramalho TC. Probing kinetic and thermodynamic parameters as well as solvent and substituent effects on spectroscopic probes of 2-amino-1,4-naphthoquinone derivatives. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.09.028] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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19
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Asymmetric biocatalysis of the nerve agent VX by human serum paraoxonase 1: molecular docking and reaction mechanism calculations. Med Chem Res 2016. [DOI: 10.1007/s00044-016-1704-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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